Self-cleaning cat litter box



FIG. 1 is a perspective view of a self-cleaning cat litter box showing my new design;

FIG. 2 is the second perspective view thereof;

FIG. 3 is the third perspective view thereof;

FIG. 4 is the fourth perspective view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a left side view thereof;

FIG. 8 is a right side view thereof;

FIG. 9 is a top plan view thereof;

FIG. 10 is a bottom plan view thereof;

FIG. 11 is an enlarged detail view as designated in FIG. 1 ;

FIG. 12 is an enlarged detail view as designated in FIG. 1 ; and,

FIG. 13 is an enlarged detail view as designated in FIG. 3 .

The drawings show broken lines that illustrate portions of the self-cleaning cat litter box. FIGS. 1, 3, 11, 12, and 13 show broken lines that represent the boundaries and indicators of the enlarged views. The broken lines form no part of the claimed design. 

CLAIM The ornamental design for a self-cleaning cat litter box, as shown and described. 